I'm not sure there's any way they can ever make Frontlines a decent gameplay mode as long it remains a three way free-for-all and Battle High continues to persist as a means of letting the winning team win more (Which just exasperates the issue of the nuke premades dropping people like flies with their AoE spam).

It's just a chaotic mess that inherently favors whatever team happens to have more players with gigantic AoE abilities.